Stack Emission Modelling of Foundry Industry

Abstract

Stack emission modelling was done by SCREEN View software for the foundry industry at Malumichampatti, Coimbatore. Emission of suspended particulate matter, Sulphur dioxide, oxides of nitrogen concentration from the stack at ground level at discrete distances was determined by the software. The software uses Gaussian air dispersion model and calculates concentration versus distance from the source. The ambient air quality is measured along the downwind direction from the source of emission. Modeled versus observed comparisons were made at each station point that is at discrete distances. Evaluation of the model was conducted using a statistical method which is R2. The SCREEN View model evaluation showed that there was good agreement between the modeled and observed concentration values. The average R2 value of all pollutants at each station points are 0.75, 0.87, 0.78, 0.86 at a distance of 200m, 500m, 800m, 1000m from the emission source respectively. The ground level concentration of all pollutants at discrete distances from the source is well within the permissible limits as prescribed by Central Pollution Control Board of India. SCREEN View has shown its utility as a suitable model for conducting dispersion modelling from stack emission with a good model skill for estimating ground level concentrations.